我在抓路徑時，遇到了錯誤，想請問為什麼他會抓到專案底下的目錄，而不是我指定的c槽

public string UpLoadImage(string Account, string base64data)
        {
            string sRtn = "";
            var type = "";

            type= base64data.Substring(0, base64data.IndexOf(";"));

            //base64data = base64data.Substring(base64data.IndexOf(","), base64data.Count());
            base64data = base64data.Substring(base64data.IndexOf(",") + 1);
            byte[] byteimage = Convert.FromBase64String(base64data);

            var UpDirPath = "c:\vue_image";
            if (!System.IO.Directory.Exists(UpDirPath))
            {
                System.IO.Directory.CreateDirectory(UpDirPath);
            }

            UpDirPath = Path.Combine(UpDirPath, @"\");

            if (type.Contains("jpeg"))
            {
                System.IO.File.WriteAllBytes(UpDirPath + Account + "_image.jpg", byteimage);
                sRtn = "上傳成功！";
            }
            else if (type.Contains("png"))
            {
                System.IO.File.WriteAllBytes(UpDirPath + Account + "_image.png", byteimage);
                sRtn = "上傳成功！";
            }
            else
                sRtn = "請上傳JPF檔orPNG檔，不支援其他檔案！";

            return sRtn;
        }